Equalizing device for spring-motors.



No..800,322. PATENTEDI=SEPT;26,19O5.

J. PBTRILLO. v EQUALIZING DEVICE FOR SPRING MOTORS.

APPLIO ATION FILED IA RZB, 1904.

WITNESSES: INVENTOR Jo'snrnrnrninnof on MERI'DEN, coNN EGTIOUT.

EQUALIZ IN'G :DEVICE FOR SPRING-MOTORS."

T all whom it may concern.-

Beitknown that I, JOSEPH PETRILLO, a subject of the King of Italy, and a .resident of Meriden, in the, county of New Haven and.

State of Connecticut, have invented certain new and useful Improvements-inEqualizing Devices for spring-Motors of which the following is'a specification.

' speed is desirable.

' which is connected in any suitable manner -My invention relates to spring-driven mechanism;such as clocks, watches, and springmotorsfor driving music-boxes, talkingsmachines, and other devices in whicha uniform The object of-"my invention is to provide asimple equalizing device for mechanisms of the above-indicated character.

I willnow proceed to describe invention as illustrated by the accompanying drawings,

and will then pointout its novel-features inv the appended claims.

Figure 1 is a plan of one form of my invention. Fig. 2 is a sectional elevation on line 2 2 of Fig. 1'; and Figs. 3 aud t are plans of another form of my invention, showing the same in two diiferent positions.

A indicates aspindle of the mechanism, which spindle carries a pinion B. This pinion is in mesh with a large gear-wheel C,

with the mainspring or driving-spring, the wheel 0 being so proportioned that about a complete revolution of it will correspond to the winding or unwinding movement of the the said main or driving spring has its one end attached to the driver and its other end secured to a fixed stud in the usual manner. The gear-wheel Chas its spindle O journaled. in a suitable plate E and in a bridge F, which, as shown, covers the gear-wheel in part.

F indicates brackets for. securing the bridge F to the plateE, as by means of screws F The gear-wheel O is provided with an elastic friction device. preferably in the nature ofa spring-tongue C struck up from the body of said gear-wheel andbent so as to stand at an angle to the plane of such wheel, as shown best in Fig. 2. This tongue is preferably curved about the spindle C as a center and projects so far away from the gear-wheel'C as to engage the bridge F du ring a portion of the revolution of said wheel. The relative arrangement of Specification of Letters Patent.

Application fiIedMarcll Z3, 190 4' Serial No. 199,584.

Patented Sept. 26 1902,

the several parts would be such that wh mainspring is fully wound the elastic friction device. will be in engagement with the bridge F. As the gear-wheel C rotates in thedirection of the arrowin Fig. 1 the friction'device will gradually come out of contact with the bridge and will finally clear the same altogether, as

shown in said Fig. 1, which represents the.

positionfof. parts, as, the wheel approaches its final position. In order to prevent overwinding of the mainspringwhen the pinion B 1s used as awmding-pmwn, I may leave a blank space 0 at, the proper point of the pe- Iriph'ery. A handCtmay be attached to the spindle C .to indicate on a scale or dial G the Econdition of themainspring, whether. wound ifully or partially in unwound. It will be un- :derstood that as long as the mainspring is under strong tension the friction device will oppose Ea considerable resistance to the unwinding of {the mainspring.

Thisresistance will gradually lessen asthe friction device comes more andam ore out of. contact. with the bridge F, and, finally,-the resistance of the'friction device will be taken off altogether during the second period of the operation. spring-tongue 0 stands at an angle to the wheel C and projects from said wheel to a plane beyond that of the bridgeF, it will be move out from its compressed condition to the free condition shown in Fig. 2. During this gradual relaxation of the spring its frictional resistance to the movement of the wheel C will obviously decrease.

In Figs. 3 and 4 the pinion b, fastened on the spindle a, mesheswith the gear-wheel 0, having the spring-tongue c spindle 0 and pointer 0 of substantially the same construction as hereinbefore described. To prevent overwinding, a gap 0 is left at an appropriate point of the periphery of the gear-wheel c, as shown in Fig. 3; or, as an alternative device, a stop-pin k may be provided on said wheel, which pin is adapted to engage one side of the bridge f at the proper time. This Since the i IOO same pin ll, will also by coming against the the pointer 0 indicates, is shown as a complete circle, with two marks indicating the wound and unwound positions of the main- I lying in a parallel plane to the plane of movement of said rotary member and adjacent to only a portion of its periphery, of an elastic friction device carried by said rotary member and adapted to engage the stationary member during part of the revolution .of said rotary member and to be disengaged from said stationary member during the remainder of the revolution of said rotary member.

2. The combination with a driving-spring a member adapted to be rotated by the influence of said spring, and a stationary member adjacent to said rotary member, of a frictionspring carried by said rotary member and adapted to engage the stationary member during'part of the revolution of said rotary mem ber.

3. The combination with a driving-spring a member adapted to be rotated under the influence of said spring, and a curved resilient tongue extending from said member, of a stationary member adapted for frictional engagement by the said tongue during part of the revolution of the rotary member.

4:- The combination With a driving-spring a member adapted to be rotated by the influence of said spring, a stationary member located adjacent to said rotary member, a friction device carried by said rotary member and adapted to engage said stationary member, means for turning the rotary member against the tension of the spring, and a device for arresting the movement of the rotary member against the tension of the spring in a position in which the said friction device engages the said stationary member.

5. The combination with a driving-spring a member adapted to be rotated by the tension of said spring, of a stationary member arranged adjacent to said rotary member, a friction device carried by said rotary member and adapted to engage said stationary member during part of the revolution of the rotary member, and a projection carried by said rotary member and arranged to engage the stationary member at one side or the other, so as to in one case limit the movement of the rotary member under the influence of the spring, and in the other case to limit the movement of said rotary member against the tension of the spring.

In testimony whereof I have signed my name to this specification in the presence of Sn] )scri l ing witnesses.

JOSEPH PETRILLO. Witnesses:

Tnos. F. DALTON, FLORA A. ANnRAs, JOHN Q. TI-IAYER. 

